Metal Buildings, best company to use, also wood construction ?s

I have a 35 x 50 x 14 metal building on a concrete slab. Two things, when the temp changes fast things condensate. The slab stays cold and the air warms up. You know like a cold beer on the bench. And pay the extra for insulation. There's only a couple of times a year it sweats bad. I turn the ceiling fans on. The insulation keeps it bareable in the summers here in Fla.